CVE-2026-73860
What it is
CRIU is a checkpoint and restore tool for Linux. Prior to 4.2.1, CRIU injects a syscall;int3 sequence at the start of the first executable virtual memory area and resumes the target process to execute parasite code. Malicious code in the target process can keep an rseq critical section armed over that injection point so the kernel's restartable-sequence abort redirects execution to an attacker-controlled callback when CRIU resumes the process. In container snapshot environments, the hijacked parasite runs with seccomp disabled and a relaxed AppArmor profile and supplies trusted data to the privileged CRIU process, which can enable higher-privilege code execution. This issue is fixed in version 4.2.1.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account, but needs a user to act. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 5.4 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-705
- Record status
- Received
Attack profile CVSS 4.0 · 5.4
- Attack vector
- Local
- Complexity
- Low
- Attack requirements
- Present
- Privileges needed
- Low
- User interaction
- Passive
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-73860.md and follow it. Check whether this project is affected by CVE-2026-73860. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/checkpoint-restore/criu/commit/c34355a7c31494a8be65b32b4410a7539f6c2442
- https://github.com/checkpoint-restore/criu/commit/f7dafedda5075fd6509bda67fbce1622e0c87a27
- https://github.com/checkpoint-restore/criu/pull/3098
- https://github.com/checkpoint-restore/criu/releases/tag/v4.2.1
- https://github.com/checkpoint-restore/criu/security/advisories/GHSA-fvqj-jvxf-x3wp
References
- https://github.com/checkpoint-restore/criu/commit/c34355a7c31494a8be65b32b4410a7539f6c2442
- https://github.com/checkpoint-restore/criu/commit/f7dafedda5075fd6509bda67fbce1622e0c87a27
- https://github.com/checkpoint-restore/criu/pull/3098
- https://github.com/checkpoint-restore/criu/releases/tag/v4.2.1
- https://github.com/checkpoint-restore/criu/security/advisories/GHSA-fvqj-jvxf-x3wp